Package gnu.mapping

Class DynamicLocation<T>

java.lang.Object

gnu.mapping.Location<T>

gnu.mapping.IndirectableLocation<T>

gnu.mapping.NamedLocation<T>

gnu.mapping.DynamicLocation<T>

All Implemented Interfaces:

EnvironmentKey, Named, Map.Entry<EnvironmentKey,T>

public class DynamicLocation<T>
extends NamedLocation<T>
implements Named

A Location that forwards to a thread-specific Location.

Field Summary

Fields inherited from class gnu.mapping.IndirectableLocation

base, DIRECT_ON_SET, INDIRECT_FLUIDS, value

Fields inherited from class gnu.mapping.Location

UNBOUND

Fields inherited from interface gnu.mapping.EnvironmentKey

FUNCTION

Constructor Summary

Constructors

Constructor	Description
DynamicLocation(Symbol name, Object property)

Method Summary

Modifier and Type	Method	Description
T	get()	Get the current value of this location.
T	get(T defaultValue)
static DynamicLocation	getInstance(Symbol name, Object property)	For a given (Symbol.
NamedLocation<T>	getLocation()	Get the thread-specific Location for this Location.
String	getName()
Object	getSymbol()
boolean	isBound()
void	set(T value)
void	setName(String name)
void	setRestore(Object oldValue)	Restore an old value.
Object	setWithSave(T newValue)	Set a value, but return cookie so old value can be restored.
void	undefine()

Methods inherited from class gnu.mapping.NamedLocation

entered, equals, getEnvironment, getKey, getKeyProperty, getKeySymbol, hashCode, matches, matches

Methods inherited from class gnu.mapping.IndirectableLocation

getBase, getBaseForce, isConstant, setAlias, setBase

Methods inherited from class gnu.mapping.Location

define, getValue, make, make, make, print, setValue, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map.Entry

getValue, setValue

Constructor Detail

DynamicLocation

public DynamicLocation(Symbol name,
                       Object property)

Method Detail

getLocation

public NamedLocation<T> getLocation()

Get the thread-specific Location for this Location.

get

public T get()

Description copied from class: Location

Get the current value of this location.

Specified by:

get in class Location<T>

get

public T get(T defaultValue)

Overrides:

get in class Location<T>

isBound

public boolean isBound()

Specified by:

isBound in class Location<T>

set

public void set(T value)

Specified by:

set in class Location<T>

setWithSave

public Object setWithSave(T newValue)

Description copied from class: Location

Set a value, but return cookie so old value can be restored. This is intended for fluid-let where (in the case of multiple threads) a simple save-restore isn't always the right thing.

Overrides:

setWithSave in class NamedLocation<T>

setRestore

public void setRestore(Object oldValue)

Description copied from class: Location

Restore an old value.

Overrides:

setRestore in class NamedLocation<T>

Parameters:

oldValue - the return value from a prior setWithSave.

undefine

public void undefine()

Overrides:

undefine in class IndirectableLocation<T>

getName

public String getName()

Specified by:

getName in interface Named

getSymbol

public Object getSymbol()

Specified by:

getSymbol in interface Named

setName

public void setName(String name)

Specified by:

setName in interface Named

getInstance

public static DynamicLocation getInstance(Symbol name,
                                          Object property)

For a given (Symbol. property)-pair, find or create a matching DynamicLocation.